Loom-brake.



R. MARTEL.

LOOM BRAKE.

APPLICATION IILED'HOV. 29, 1911.

Patented May 26, 1914.

8 wow 1 :01

l a humus UNITED sirarns rain FFT RAUL MARTEL, OFFALL RIVER,MASSACHUSETTS.

LOOM-BRAKE.

Specification of Letters Patent.

Application filed November 29, 19 11.

Patented May 26, 1914.

Serial No. 663,011.

whereby the mechanism is started and. stopped. In the generalconstruction of looms the drive belt is-shifted by means of an operatinglever and when it is required to stop the loom a brake shoe is appliedto a brake,

wheel, the brake mechanism being brought into operation the instant theloom is thrown out of action by the shifting of the drive belt from thetight to the loose pulley.

This invention provides means for automatically releasing the brakeafter the same has been applied to stop the loom so that when theoperating lever is actuated to start the loom the latter may respondquickly be cause of its freedom from the brake which has been previouslyreleased,

The invention contemplates an attachment which is applied to theoperating lever to automatically release the brake after the loom hascome to a standstill, the attachment being of simple nature andeffective in operation so as to insure a release of the brake at theproper time, namely when the loom has come to rest.

The invention consists of the novel features, details of constructionand combination of parts, which hereinafter will be more particularlyset forth, illustrated in the accompanying drawing, and pointed out inthe appended claim.

Referring to the drawings, forming a part of the specification, Figure 1is a detail view in elevation of the frame of a loom, showing the drivepulley and brake wheel together with the operating lever and concomitantparts. Fig. 2 is a detail view of the operating lever and parts carriedthereby,

showing the relative position of the brake lever and operating partswhen the loom is running. Fig. 3 is a view of the parts illustrated inFig. 2, showing their relation when the loom is stopped.

Corresponding and like parts are referred to in the followingdescription, and indicated in all the views of the drawings, by

the same reference characters.

The numeral 1 designates the frame of the loom, which may be of anyconstruction. The operating lever is indicated at 2 and may be arrangedin any convenient position so as to throw the loom into or out ofaction, The main shaft 3 is provided with a brake wheel 4: and pulleys5, the latter comprising the usual tight and loose pulleys whichcooperate with a drive belt 6. Suitable connections are interposedbetween the operating lever 2 and drive belt 6 for shifting the latterfrom the tight pulley to the loose pulley and vice versa.

A brake shoe 7 is arranged to engage the brake wheel 4 and is mountedupon one end of a lever 8, the opposite end of said lever beingconnected to the brake lever 9. The brake lever 8 is fulcrumed betweenits ends, at 13, and is rigidly connected at its lower end to the lever9, which latter forms in effect a continua tion of the lever 8 so as tomove therewith. The combined weight of the lever and the lower portionof the lever 8 is greater than the weight of the brake shoe and theupper part of the lever 8, hence when the outer end of the lever 9 isunsupported the brake shoe is held in engagement with the brake wheel.

An arm 10 is clipped or otherwise adjustably connected to the operatinglever 2 and has an inclined portion forming a cam which engages thebrake lever 9 so as to hold the brake shoe 7 away from the brake wheel4:. l/Vhen the operating lever 2 is actuated to throw the 100m out ofaction the brake lever 9 rides downwardly upon the inclined or camportion of the arm 10 to admit of the brake shoe automatically cominginto play so as to stop the loom.

The releaser 11 is pivotally connected to the cam arm 10 and its lowerend is weighted so as to normally hold the releaser in approximatelyvertical position.

The releaser consists of a bar 11 pivoted between its ends to the arm 10and having a stepped portion 12 above and near the pivot connectionbetween the said bar and arm, the lower end of said bar being heavy tonormally hold the bar in vertical position. When the loom is running theouter end of the brake lever 9 engages and rests upon the upper outerend of the arm'10, thereby holding the brake out of action. Upon movingthe upper end of the lever 2 inward to throw the drive belt from thetight to the loose pulley, as when it is required to throw the loom outof action, the arm 10 is withdrawn from engagement with the lever 9,thereby permitting the brake to come into play to quickly check themotion of the loom. During this movement of the lever 2 the lever 9 willengage a step of the part 12 of the bar 11 and cause the latter toincline to the verticalFig. 3. To start the loom the upper end of lever2 is drawn outward to throw the drive belt from the loose to the tightpulley and at the same time the bar 11 is moved and tending to assume avertical position lifts the outer end of the lever 9 and releases thebrake. When the arm 10 engages the lever 9 the part 11 is released andswings into vertical position. The lever 9 is bolted or otherwiserigidly connected to the lower outer end of the lever 8 and the combinedweight of the lever 9 and the lower half of the lever 8 is greater thanthe weight of the brake shoe 7 and the upper half of the lever 8 so thatwhen the outer end of the lever 9 is unsupported the brake shoe ispressed against the brake wheel. lVhen the loom is running the outer endof the lever 9 is supported by means of the arm 10. The lever 2 isoperated quickly when throwing the loom out of action. Upon operatingthe lever 2 to shift the drive belt from the tight to the loose pulleythe inclined portion of the arm 10' is withdrawn from beneath the outerend of the lever 9, thereby permitting the brake shoe to come into play.When the brake shoe engages the brake wheel the latter is instantlystopped because the rota tion of the brake wheel is such as to cause ajamming of the brake shoe thereagainst. During the complete movement ofthe operating lever 2 there is a period when the outer end of the lever9 is clear of the arm 10 and the releaser 11 and during this period thebrake shoe comes into play to bring the loom to rest. The operation ofthe brake shoe is momentary, it being the object of the invention tostop the loom instantly so as to prevent any overthrow of the shuttle orother working parts after the power has been disconnected by theshifting of the drive belt.

From the foregoing description, taken in connection with theaccompanying drawing, the advantages of the construction and of themethod of operation will be readily apparent to those skilled in the artto which the invention appertains, and While I have described theprinciple of operation of the invention, together with the device whichI now consider to be the best embodiment thereof, I desire to have itunderstood tha the device shown is merely illustrative, and that suchchanges may be made when desired as are within the scope of the claimappcnded hereto.

Having thus described the invention What is claimed as new, is

In a loom the combination of a brake wheel, a brake shoe, a brake lever,an operating lever for throwing the 100111 into or out of action, an armattached to and movable with the operating lever and having a camportion to engage with the brake lever and hold the brake out of actionwhen the loom is running, and a bar pivoted between its ends to the saidarm and having 1 its lower end weighted to cause the bar to normallyassume a vertical position and having a. stepped portion above and nearthe pivot connection between the said bar and arm. I

In testimony whereof I affix my signature in presence of two witnesses.

RAUL MARTEL. Witnesses Gnonen H. PACAUD, ARTHUR GANTHIES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

